Brachiopods - 3-D Hebertella occidentalis a.jpg

Hebertella occidentalis Brachiopod

SITE LOCATION: Trimble County, Kentucky
TIME PERIOD: Ordovician Period (445-485 Million Years ago)
Data: Moderate to large Hebertella species with a subquadrate outline and a moderate to highly pronounced sulcus. Shell wider than long; shell depth variable, convexoconcave to unequally biconvex; cardinal extremities angular; sulcus wide with moderate to very high depth, typically well developed in larger specimins; ventral muscle scars of variable width; dorsal and ventral umbonal angles low (<135 degrees). Articulate brachiopod.
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: †Orthida
Family: †Plectorthidae
Genus: †Herbertella
Species: †occidentalis